I don't use Trillian (I had to look up what it was) but then I don't use any kind of IM program, not even (?) ICQ: haven't actually found a need for one.
Then again I don't use a mobile phone much, and I've never sent a text message on one. I've never had a PDA or palmtop and I don't own a calculator (there's a ruddy great big one on my desk, you know!). Somehow I seem to be able to manage without.
Steve.